Table 1 Comparison of interviews, linkage, and overall dataset
interview livebirth and linkage (n = 1024) | interview only, reported at least one livebirth (n = 458) | interview only, reported no births (n = 255) | linkage only (n = 2207) | neither linkage nor interview (n = 1970) | p for difference | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
N | % | N | % | N | % | N | % | N | % | ||
number of visits | < 0.01 | ||||||||||
1 | 130 | 12.7 | 72 | 15.7 | 47 | 18.4 | 817 | 37.0 | 989 | 50.2 | |
2 | 136 | 13.3 | 23 | 5.0 | 23 | 9.0 | 515 | 23.3 | 371 | 18.8 | |
3–4 | 256 | 25.0 | 114 | 8.6 | 71 | 27.8 | 537 | 24.3 | 346 | 17.6 | |
5–6 | 195 | 19.0 | 89 | 12.6 | 44 | 17.3 | 216 | 9.8 | 160 | 8.1 | |
7 or more | 307 | 30.0 | 160 | 34.9 | 70 | 27.5 | 122 | 5.5 | 103 | 5.2 | |
race | < 0.01 | ||||||||||
black | 433 | 42.3 | 165 | 36.0 | 109 | 42.8 | 768 | 34.8 | 668 | 33.9 | |
white | 591 | 57.7 | 293 | 64.0 | 146 | 57.3 | 1439 | 65.2 | 1302 | 66.1 | |
ever smoker | < 0.01 | ||||||||||
yes | 368 | 42.3 | 206 | 49.3 | 80 | 41.5 | 490 | 30.8 | 436 | 33.5 | |
no | 502 | 57.7 | 212 | 50.7 | 124 | 58.5 | 1103 | 69.2 | 866 | 66.5 | |
highest parental education | < 0.01 | ||||||||||
> high school | 347 | 52.7 | 139 | 50.0 | 72 | 47.7 | 312 | 43.6 | 162 | 42.5 | |
high school or less | 311 | 47.3 | 139 | 50.0 | 79 | 52.3 | 404 | 56.4 | 219 | 57.5 | |
mean SD | |||||||||||
age at youngest visit | 8.8 | 3.8 | 12.9 | 9.8 | 9.6 | 5.5 | 8.8 | 3.5 | 10.0 | 5.1 | < 0.01 |
age at oldest visit | 25.9 | 12.6 | 31.1 | 13.7 | 25.3 | 13.3 | 15.4 | 8.1 | 15.1 | 9.2 | < 0.01 |
age in 2018 | 44.6 | 7.3 | 50.5 | 8.3 | 45.2 | 8.5 | 42.5 | 7.4 | 44.3 | 9.3 | < 0.01 |
median IQR | |||||||||||
year at first visit | 1978 | 1974–1983 | 1974 | 1974–1979 | 1977 | 1974–1984 | 1981 | 1976–1988 | 1979 | 1974–1988 | < 0.01 |
year at most recent visit | 2000 | 1993–2014 | 2000 | 1993–2014 | 1999 | 1992–2014 | 1988 | 1985–1994 | 1988 | 1980–1994 | < 0.01 |
mean SD | |||||||||||
BMI | 21.6 | 5.2 | 22.5 | 5.4 | 22.7 | 6.4 | 19.2 | 4.2 | 19.5 | 4.8 | < 0.01 |
child BMI | 17.4 | 3.2 | 17.3 | 3.1 | 18.5 | 4.0 | 17.1 | 2.9 | 17.3 | 3.3 | < 0.01 |
adolescent BMI | 21.6 | 4.5 | 20.7 | 3.6 | 23.4 | 6.3 | 21.4 | 4.5 | 21.4 | 4.7 | 0.39 |
adult BMI | 27.3 | 7.1 | 26.4 | 6.3 | 28.6 | 9.8 | 26.1 | 7.1 | 25.5 | 6.6 | < 0.01 |
cholesterol | 171.3 | 26.0 | 172.4 | 29.8 | 170.7 | 23.8 | 167.3 | 26.5 | 167.5 | 28.8 | < 0.01 |
child cholesterol | 168.4 | 26.9 | 166.7 | 25.8 | 167.5 | 28.9 | 167.6 | 27.0 | 168.0 | 27.9 | 0.90 |
adolescent cholesterol | 162.3 | 27.8 | 157.3 | 25.4 | 161.0 | 28.1 | 162.5 | 27.2 | 160.7 | 28.3 | 0.02 |
adult cholesterol | 182.1 | 31.5 | 184.4 | 35.7 | 177.8 | 32.5 | 176.6 | 34.4 | 179.2 | 35.9 | < 0.01 |
systolic blood pressure | 103.9 | 8.8 | 107.1 | 10.2 | 104.4 | 9.3 | 100.8 | 9.0 | 101.6 | 10.1 | < 0.01 |
child SBP | 97.3 | 8.0 | 97.7 | 8.9 | 97.9 | 8.6 | 96.9 | 8.6 | 96.8 | 8.8 | 0.19 |
adolescent SBP | 107.6 | 8.2 | 107.6 | 7.7 | 107.8 | 8.9 | 106.8 | 8.2 | 107.5 | 8.7 | 0.11 |
adult SBP | 110.1 | 9.8 | 111.6 | 10.5 | 110.7 | 10.5 | 109.0 | 9.8 | 110.2 | 9.8 | < 0.01 |